| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | than have previously been | 30 |
|
| 2 | than have previously [been] | 30 |
|
| 3 | than have previously be | 30 |
|
| 4 | than had previously [be] | 22 |
|
| 5 | than has previously [be] | 8 |
|
